Shows percent change... but not the magnitude of the change. Seeing a map that combined both percentage and magnitude to compute the colors (perhaps similar to

Shows percent change... but not the magnitude of the change. Seeing a map that combined both percentage and magnitude to compute the colors (perhaps similar to the Tf–idf calculation?) would be much more interpretable. 50% of people leaving the middle of a forest doesn't really tell me much, versus 50% change in a dense city.